Space Weather Message Code: ALTK05 Serial Number: 1078 Issue Time: 2017 Mar 27 0740 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 0735 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur.

Space Weather Message Code: ALTK05 Serial Number: 1077 Issue Time: 2017 Mar 27 0559 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 0559 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur.

Space Weather Message Code: WARK05 Serial Number: 1327 Issue Time: 2017 Mar 27 0520 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Mar 27 0520 UTC Valid To: 2017 Mar 27 1500 UTC Warning Condition: Onset NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power

Space Weather Message Code: ALTK04 Serial Number: 1966 Issue Time: 2017 Mar 27 0500 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Mar 27 0459 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Aurora – Aurora may be

Space Weather Message Code: WARK04 Serial Number: 3177 Issue Time: 2017 Mar 27 0351 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Mar 27 0350 UTC Valid To: 2017 Mar 27 2359 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WATA30 Serial Number: 151 Issue Time: 2017 Mar 26 1902 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 27: G1 (Minor) Mar 28: G2 (Moderate) Mar 29: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents

Space Weather Message Code: WATA30 Serial Number: 150 Issue Time: 2017 Mar 25 1515 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 26: None (Below G1) Mar 27: G1 (Minor) Mar 28: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced

Space Weather Message Code: WATA20 Serial Number: 778 Issue Time: 2017 Mar 24 1425 UTC CANCEL WATCH: Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 777 Original Issue Time: 2017 Mar 23 2000 UTC Comment: G1 (Minor) geomagnetic storms conditions are no longer anticipated. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak

Space Weather Message Code: WATA20 Serial Number: 777 Issue Time: 2017 Mar 23 2000 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 24: G1 (Minor) Mar 25: None (Below G1) Mar 26: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.

Space Weather Message Code: WARK04 Serial Number: 3176 Issue Time: 2017 Mar 23 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3175 Valid From: 2017 Mar 21 0605 UTC Now Valid Until: 2017 Mar 23 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents –